1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.webdav;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.GetterUtil;
28  import com.liferay.portal.kernel.util.InstancePool;
29  import com.liferay.portal.kernel.util.Validator;
30  import com.liferay.portal.model.User;
31  import com.liferay.portal.security.auth.PrincipalThreadLocal;
32  import com.liferay.portal.security.permission.PermissionChecker;
33  import com.liferay.portal.security.permission.PermissionCheckerFactory;
34  import com.liferay.portal.security.permission.PermissionThreadLocal;
35  import com.liferay.portal.service.UserLocalServiceUtil;
36  import com.liferay.portal.util.PropsValues;
37  import com.liferay.portal.webdav.methods.Method;
38  import com.liferay.portal.webdav.methods.MethodFactory;
39  
40  import javax.servlet.http.HttpServlet;
41  import javax.servlet.http.HttpServletRequest;
42  import javax.servlet.http.HttpServletResponse;
43  
44  /**
45   * <a href="WebDAVServlet.java.html"><b><i>View Source</i></b></a>
46   *
47   * @author Brian Wing Shun Chan
48   * @author Alexander Chow
49   */
50  public class WebDAVServlet extends HttpServlet {
51  
52      public void service(
53          HttpServletRequest request, HttpServletResponse response) {
54  
55          PermissionChecker permissionChecker = null;
56  
57          int status = HttpServletResponse.SC_PRECONDITION_FAILED;
58  
59          if (_log.isInfoEnabled()) {
60              _log.info(request.getMethod() + " " + request.getRequestURI());
61          }
62  
63          if (_log.isDebugEnabled()) {
64              _log.debug("User agent " + request.getHeader("User-agent"));
65          }
66  
67          try {
68              if (isIgnoredResource(request)) {
69                  status = HttpServletResponse.SC_NOT_FOUND;
70  
71                  return;
72              }
73  
74              WebDAVStorage storage = getStorage(request);
75  
76              // Set the path only if it has not already been set. This works
77              // if and only if the servlet is not mapped to more than one URL.
78  
79              if (storage.getRootPath() == null) {
80                  storage.setRootPath(getRootPath(request));
81              }
82  
83              // Permission checker
84  
85              String remoteUser = request.getRemoteUser();
86  
87              if (remoteUser != null) {
88                  PrincipalThreadLocal.setName(remoteUser);
89  
90                  long userId = GetterUtil.getLong(remoteUser);
91  
92                  User user = UserLocalServiceUtil.getUserById(userId);
93  
94                  permissionChecker = PermissionCheckerFactory.create(user, true);
95  
96                  PermissionThreadLocal.setPermissionChecker(permissionChecker);
97              }
98  
99              // Get the method instance
100 
101             Method method = MethodFactory.create(request);
102 
103             // Process the method
104 
105             WebDAVRequest webDavRequest = new WebDAVRequest(
106                 storage, request, response, permissionChecker);
107 
108             status = method.process(webDavRequest);
109         }
110         catch (Exception e) {
111             _log.error(e, e);
112         }
113         finally {
114             if (status > 0) {
115                 response.setStatus(status);
116 
117                 if (_log.isInfoEnabled()) {
118                     _log.info("Status code " + status);
119                 }
120             }
121 
122             try {
123                 PermissionCheckerFactory.recycle(permissionChecker);
124             }
125             catch (Exception e) {
126             }
127         }
128     }
129 
130     protected String getRootPath(HttpServletRequest request) {
131         StringBuilder sb = new StringBuilder();
132 
133         sb.append(WebDAVUtil.fixPath(request.getContextPath()));
134         sb.append(WebDAVUtil.fixPath(request.getServletPath()));
135 
136         return sb.toString();
137     }
138 
139     protected WebDAVStorage getStorage(HttpServletRequest request)
140         throws WebDAVException {
141 
142         String[] pathArray = WebDAVUtil.getPathArray(
143             request.getPathInfo(), true);
144 
145         String storageClass = null;
146 
147         if (pathArray.length == 1) {
148             storageClass = CompanyWebDAVStorageImpl.class.getName();
149         }
150         else if (pathArray.length == 2) {
151             storageClass = GroupWebDAVStorageImpl.class.getName();
152         }
153         else if (pathArray.length >= 3) {
154             storageClass = WebDAVUtil.getStorageClass(pathArray[2]);
155         }
156 
157         if (Validator.isNull(storageClass)) {
158             throw new WebDAVException(
159                 "Invalid WebDAV path " + request.getPathInfo());
160         }
161 
162         return (WebDAVStorage)InstancePool.get(storageClass);
163     }
164 
165     protected boolean isIgnoredResource(HttpServletRequest request) {
166         String[] pathArray = WebDAVUtil.getPathArray(
167             request.getPathInfo(), true);
168 
169         if ((pathArray == null) || (pathArray.length <= 0)) {
170             return true;
171         }
172 
173         String resourceName = pathArray[pathArray.length - 1];
174 
175         for (String ignore : PropsValues.WEBDAV_IGNORE) {
176             if (ignore.equals(resourceName)) {
177                 if (_log.isDebugEnabled()) {
178                     _log.debug(
179                         "Skipping over " + request.getMethod() + " " +
180                             request.getPathInfo());
181                 }
182 
183                 return true;
184             }
185         }
186 
187         return false;
188     }
189 
190     private static Log _log = LogFactoryUtil.getLog(WebDAVServlet.class);
191 
192 }